Leave in conditioner recommendations for Keratin-treated hair

Hello! I'm hoping to get some leave on conditioner recommendations for Keratin treated hair.My daughter got a Keratin Express Blowout and I was told to use products that are free of sodium chloride and sulfates. I purchased a shampoo and conditoner at the salon but was wondering what kind of leave on conditioner would be safe to use.
Thanks in advance!
Thanks in advance!
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